Brentis wrote:Good job J.W.
I have considered sticking with an A123 pack(cell_man).
16s4p fits nice and tight, keeps the manufactured look,
and is basically maintenance free.
Alas, I need more voltage and capacity for what I plan.
I want an honest 64kmh/40mph bike.
Having the flexibility of Lipo, to run either a high voltage/low capacity fast bike.
or lower voltage/higher capacity commuter is paramount.
I haven't used the alu. case yet,as I am still saving my pennies for the lipo packs.
I'll be sure to update when I do.
It's reassuring to see a few of these frames being used.
Where abouts are you located?
Seems quite a few of these were sold in the UK.
Here in Canada they sold coast to coast @ Canadian Tire stores, but each store only moved a few units.
Too expensive I guess ($1000) compared to the Schwinn IZip @ half the price
and the same speed limit, of which they sold plenty.
Back in 2008 when I first got the ebike bug, not knowing anything E, I purchased the Strong.
I was impressed with full suspension, disk brakes, lights, horn, etc.
I rode it for 1 day before it mysteriously "died", in hind sight it was probably a simple fix.
I was pissed, a $1000 for 1 days use. I took it back to the store.
They told me that they had a guy who takes care of the ebikes warranty.
He only came to that store once a month though.
"Give me my money back."
"Sorry we won't except returns on bikes."
I calmly express my displeasure.
They decide that I can exchange for another. I didn't trust that it wouldn't breakdown to.
They suggested I take the Schwinn, plus a few hundred dollars, instead. Much lower rate of problems.
Glad I did, because if I got a full return refund, I may never have looked at another Ebike again.
I'm located in Ottawa and I remember the Strong GT's were sold for about $1200 regular price and $1000 on sale at Canadian Tire, I would never have pumped up that kind of cash for a consumer-grade ebike (meaning, govt-regulated noob machine with no ooomph). So I purchased the Schwinn Invidia--an IZIP with "unisex" frame--on sale for $400 with the intention of overvolting it and was satisfied with it for the first week or so but it didn't give me the ebike grin I got with my later builds. I also didn't like the build quality at all: the rear rim wasn't trued properly and I had to exchange the lead batts 3 times in 2 months because it only gave me 10km range or less on a full charge WITH aggressive pedaling. I have since converted it to a 7S10P LiMn setup, reduced the drive sprocket by 4 Teeth for higher top speed and sold it to a friend for cheap. That will be the last ebike I purchase off the shelf, if I can't build it myself I just won't bother.
By the way on page 2 of this thread you talked about the lateral strength of the swing arm pivot being that it was only 2 1/2" across with 1/4" tangs and if it would be able to take 60km/h + with heavy rims. When we reduce the rim size designed for the frame we're going to increase the stress on the swingarm and reduce load-carrying capacity. Being a steel frame it already handles like a pig and I personally lack the equipment (and the spare parts) to see just how much stress that pivot will take before getting a hairline fracture. We could use a different monoshock or if possible adjust the one we already have for slightly less travel. What do you think?
I also like your idea of using drum brakes for the front rim, where did you get the 90mm Sturney? All I could find was 70mm...